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CAT6509 power supply 240VAC

Currently CAT6509 power supply is running 120VAC, people plan changing to 240VAC to get more power and install another blade X6316-GE-TX, can somebody to confirm this?


More--2006 Mar 05 17:25:14 %SYS-5-SYS_INSUFFPWR:Insufficient power

available for current configuration

2006 Mar 05 17:25:14 %SYS-5-MOD_PWRDENY:Power denied to module 7

2006 Mar 05 17:25:14 %SYS-5-MOD_INSERT:Module 7 has been inserted

2006 Mar 05 17:25:51 %SYS-5-MOD_REMOVE:Module 7 has been removed


cat6509> (enable) sh env pow

PS1 Capacity: 1153.32 Watts (27.46 Amps @42V)

PS2 Capacity: 1153.32 Watts (27.46 Amps @42V)

PS Configuration : PS1 and PS2 in Redundant Configuration.

Total Power Available: 1153.32 Watts (27.46 Amps @42V)

Total Power Available for Line Card Usage: 1153.32 Watts (27.46 Amps


Total Power Drawn From the System: 1082.34 Watts (25.77 Amps @42V)

Remaining Power in the System: 70.98 Watts ( 1.69 Amps @42V)

Configured Default Inline Power allocation per port: 6.500 Watts (0.15

Amps @42V)

Slot power Requirement/Usage :

Slot Card Type PowerRequested PowerAllocated CardStatus

Watts A @42V Watts A @42V

---- ------------------- ------- ------ ------- ------ ----------

1 WS-X6K-SUP1A-2GE 71.40 1.70 71.40 1.70 ok

2 WS-X6K-SUP1A-2GE 71.40 1.70 71.40 1.70 standby

3 WS-X6348-RJ-45 100.38 2.39 100.38 2.39 ok

4 WS-X6348-RJ-45 100.38 2.39 100.38 2.39 ok

8 WS-X6316-GE-TX 216.30 5.15 216.30 5.15 ok

9 WS-X6348-RJ-45 100.38 2.39 100.38 2.39 ok

Slot Inline Power Requirement/Usage :

Slot CardType Total Allocated Max H/W Supported Max H/W


To Module (Watts) Per Module (Watts) Per Port


---- ------------------- ----------------- ------------------


3 WS-X6348-RJ-45 252.00 399.00 7.000

4 WS-X6348-RJ-45 170.10 399.00 7.000




Re: CAT6509 power supply 240VAC

I am afraid that using a higher mains voltage will not resolve your problem. Power supplies have a fixed output rating. Increasing the voltage will only result in a smaller current drawn from the mains but a 1000W power supply will still deliver 1000W to the switch. I checked this on CCO and when you look at the specs for the various power supplies, you will see what I mean:

The only feasible resolution will be to install a PSU with more output power.




Re: CAT6509 power supply 240VAC

Leo is right. Increasing the input voltage will just lower the current draw on the circuit (Ohm's Law). With a lower input voltage the Power Supply has to work harder to deliver the same power output to the chassis.

To add additional modules to this switch you will need to install a larger set of power supplies.

Please rate all helpful posts.


New Member

Re: CAT6509 power supply 240VAC

Thanks Leo and Brad for the good points. Sorry for missing some information about the power supply, the customer have two CAC-2500W power supply, and working in the redundant configuration. when the AC input is 100 to 120VAC, will get 1300W maximum output.




Re: CAT6509 power supply 240VAC

Ahh Yes. I was assuming 1300W supplies.

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